License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2008-04-28 15:47:20 +08:00
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/* We need to carefully read the error status, ACK the errors,
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* prevent recursive traps, and pass the information on to C
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* code for logging.
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*
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* We pass the AFAR in as-is, and we encode the status
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* information as described in asm-sparc64/sfafsr.h
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*/
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.type __spitfire_access_error,#function
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__spitfire_access_error:
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/* Disable ESTATE error reporting so that we do not take
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* recursive traps and RED state the processor.
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*/
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stxa %g0, [%g0] ASI_ESTATE_ERROR_EN
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membar #Sync
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mov UDBE_UE, %g1
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ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR
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/* __spitfire_cee_trap branches here with AFSR in %g4 and
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* UDBE_CE in %g1. It only clears ESTATE_ERR_CE in the ESTATE
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* Error Enable register.
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*/
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__spitfire_cee_trap_continue:
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ldxa [%g0] ASI_AFAR, %g5 ! Get AFAR
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rdpr %tt, %g3
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and %g3, 0x1ff, %g3 ! Paranoia
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sllx %g3, SFSTAT_TRAP_TYPE_SHIFT, %g3
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or %g4, %g3, %g4
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rdpr %tl, %g3
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cmp %g3, 1
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mov 1, %g3
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bleu %xcc, 1f
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sllx %g3, SFSTAT_TL_GT_ONE_SHIFT, %g3
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or %g4, %g3, %g4
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/* Read in the UDB error register state, clearing the sticky
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* error bits as-needed. We only clear them if the UE bit is
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* set. Likewise, __spitfire_cee_trap below will only do so
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* if the CE bit is set.
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*
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* NOTE: UltraSparc-I/II have high and low UDB error
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* registers, corresponding to the two UDB units
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* present on those chips. UltraSparc-IIi only
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* has a single UDB, called "SDB" in the manual.
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* For IIi the upper UDB register always reads
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* as zero so for our purposes things will just
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* work with the checks below.
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*/
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1: ldxa [%g0] ASI_UDBH_ERROR_R, %g3
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and %g3, 0x3ff, %g7 ! Paranoia
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sllx %g7, SFSTAT_UDBH_SHIFT, %g7
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or %g4, %g7, %g4
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andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE
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be,pn %xcc, 1f
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nop
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stxa %g3, [%g0] ASI_UDB_ERROR_W
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membar #Sync
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1: mov 0x18, %g3
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ldxa [%g3] ASI_UDBL_ERROR_R, %g3
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and %g3, 0x3ff, %g7 ! Paranoia
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sllx %g7, SFSTAT_UDBL_SHIFT, %g7
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or %g4, %g7, %g4
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andcc %g3, %g1, %g3 ! UDBE_UE or UDBE_CE
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be,pn %xcc, 1f
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nop
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mov 0x18, %g7
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stxa %g3, [%g7] ASI_UDB_ERROR_W
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membar #Sync
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1: /* Ok, now that we've latched the error state, clear the
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* sticky bits in the AFSR.
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*/
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stxa %g4, [%g0] ASI_AFSR
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membar #Sync
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rdpr %tl, %g2
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cmp %g2, 1
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rdpr %pil, %g2
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bleu,pt %xcc, 1f
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2008-11-24 13:55:29 +08:00
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wrpr %g0, PIL_NORMAL_MAX, %pil
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2008-04-28 15:47:20 +08:00
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ba,pt %xcc, etraptl1
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rd %pc, %g7
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2016-04-28 05:27:37 +08:00
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ba,a,pt %xcc, 2f
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arch/sparc: Avoid DCTI Couples
Avoid un-intended DCTI Couples. Use of DCTI couples is deprecated.
Also address the "Programming Note" for optimal performance.
Here is the complete text from Oracle SPARC Architecture Specs.
6.3.4.7 DCTI Couples
"A delayed control transfer instruction (DCTI) in the delay slot of
another DCTI is referred to as a “DCTI couple”. The use of DCTI couples
is deprecated in the Oracle SPARC Architecture; no new software should
place a DCTI in the delay slot of another DCTI, because on future Oracle
SPARC Architecture implementations DCTI couples may execute either
slowly or differently than the programmer assumes it will.
SPARC V8 and SPARC V9 Compatibility Note
The SPARC V8 architecture left behavior undefined for a DCTI couple. The
SPARC V9 architecture defined behavior in that case, but as of
UltraSPARC Architecture 2005, use of DCTI couples was deprecated.
Software should not expect high performance from DCTI couples, and
performance of DCTI couples should be expected to decline further in
future processors.
Programming Note
As noted in TABLE 6-5 on page 115, an annulled branch-always
(branch-always with a = 1) instruction is not architecturally a DCTI.
However, since not all implementations make that distinction, for
optimal performance, a DCTI should not be placed in the instruction word
immediately following an annulled branch-always instruction (BA,A or
BPA,A)."
Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-18 04:52:21 +08:00
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nop
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2008-04-28 15:47:20 +08:00
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1: ba,pt %xcc, etrap_irq
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rd %pc, %g7
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2:
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#ifdef CONFIG_TRACE_IRQFLAGS
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call trace_hardirqs_off
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nop
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#endif
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mov %l4, %o1
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mov %l5, %o2
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call spitfire_access_error
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add %sp, PTREGS_OFF, %o0
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2016-04-28 05:27:37 +08:00
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ba,a,pt %xcc, rtrap
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2008-04-28 15:47:20 +08:00
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.size __spitfire_access_error,.-__spitfire_access_error
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/* This is the trap handler entry point for ECC correctable
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* errors. They are corrected, but we listen for the trap so
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* that the event can be logged.
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*
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* Disrupting errors are either:
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* 1) single-bit ECC errors during UDB reads to system
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* memory
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* 2) data parity errors during write-back events
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*
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* As far as I can make out from the manual, the CEE trap is
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* only for correctable errors during memory read accesses by
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* the front-end of the processor.
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*
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* The code below is only for trap level 1 CEE events, as it
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* is the only situation where we can safely record and log.
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* For trap level >1 we just clear the CE bit in the AFSR and
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* return.
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*
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* This is just like __spiftire_access_error above, but it
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* specifically handles correctable errors. If an
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* uncorrectable error is indicated in the AFSR we will branch
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* directly above to __spitfire_access_error to handle it
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* instead. Uncorrectable therefore takes priority over
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* correctable, and the error logging C code will notice this
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* case by inspecting the trap type.
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*/
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.type __spitfire_cee_trap,#function
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__spitfire_cee_trap:
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ldxa [%g0] ASI_AFSR, %g4 ! Get AFSR
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mov 1, %g3
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sllx %g3, SFAFSR_UE_SHIFT, %g3
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andcc %g4, %g3, %g0 ! Check for UE
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bne,pn %xcc, __spitfire_access_error
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nop
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/* Ok, in this case we only have a correctable error.
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* Indicate we only wish to capture that state in register
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* %g1, and we only disable CE error reporting unlike UE
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* handling which disables all errors.
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*/
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ldxa [%g0] ASI_ESTATE_ERROR_EN, %g3
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andn %g3, ESTATE_ERR_CE, %g3
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stxa %g3, [%g0] ASI_ESTATE_ERROR_EN
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membar #Sync
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/* Preserve AFSR in %g4, indicate UDB state to capture in %g1 */
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ba,pt %xcc, __spitfire_cee_trap_continue
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mov UDBE_CE, %g1
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.size __spitfire_cee_trap,.-__spitfire_cee_trap
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.type __spitfire_data_access_exception_tl1,#function
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__spitfire_data_access_exception_tl1:
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rdpr %pstate, %g4
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
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mov TLB_SFSR, %g3
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mov DMMU_SFAR, %g5
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ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
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ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
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stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
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membar #Sync
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rdpr %tt, %g3
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cmp %g3, 0x80 ! first win spill/fill trap
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blu,pn %xcc, 1f
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cmp %g3, 0xff ! last win spill/fill trap
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bgu,pn %xcc, 1f
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nop
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ba,pt %xcc, winfix_dax
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rdpr %tpc, %g3
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1: sethi %hi(109f), %g7
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ba,pt %xcc, etraptl1
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109: or %g7, %lo(109b), %g7
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mov %l4, %o1
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mov %l5, %o2
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call spitfire_data_access_exception_tl1
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add %sp, PTREGS_OFF, %o0
|
2016-04-28 05:27:37 +08:00
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ba,a,pt %xcc, rtrap
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2008-04-28 15:47:20 +08:00
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.size __spitfire_data_access_exception_tl1,.-__spitfire_data_access_exception_tl1
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.type __spitfire_data_access_exception,#function
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__spitfire_data_access_exception:
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rdpr %pstate, %g4
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
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mov TLB_SFSR, %g3
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mov DMMU_SFAR, %g5
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ldxa [%g3] ASI_DMMU, %g4 ! Get SFSR
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ldxa [%g5] ASI_DMMU, %g5 ! Get SFAR
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stxa %g0, [%g3] ASI_DMMU ! Clear SFSR.FaultValid bit
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membar #Sync
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sethi %hi(109f), %g7
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ba,pt %xcc, etrap
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109: or %g7, %lo(109b), %g7
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mov %l4, %o1
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mov %l5, %o2
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call spitfire_data_access_exception
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add %sp, PTREGS_OFF, %o0
|
2016-04-28 05:27:37 +08:00
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ba,a,pt %xcc, rtrap
|
2008-04-28 15:47:20 +08:00
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.size __spitfire_data_access_exception,.-__spitfire_data_access_exception
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.type __spitfire_insn_access_exception_tl1,#function
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__spitfire_insn_access_exception_tl1:
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rdpr %pstate, %g4
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
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mov TLB_SFSR, %g3
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ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
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rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
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stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
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membar #Sync
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sethi %hi(109f), %g7
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ba,pt %xcc, etraptl1
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109: or %g7, %lo(109b), %g7
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mov %l4, %o1
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mov %l5, %o2
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call spitfire_insn_access_exception_tl1
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add %sp, PTREGS_OFF, %o0
|
2016-04-28 05:27:37 +08:00
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ba,a,pt %xcc, rtrap
|
2008-04-28 15:47:20 +08:00
|
|
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.size __spitfire_insn_access_exception_tl1,.-__spitfire_insn_access_exception_tl1
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.type __spitfire_insn_access_exception,#function
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__spitfire_insn_access_exception:
|
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rdpr %pstate, %g4
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wrpr %g4, PSTATE_MG|PSTATE_AG, %pstate
|
|
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|
|
mov TLB_SFSR, %g3
|
|
|
|
|
ldxa [%g3] ASI_IMMU, %g4 ! Get SFSR
|
|
|
|
|
rdpr %tpc, %g5 ! IMMU has no SFAR, use TPC
|
|
|
|
|
stxa %g0, [%g3] ASI_IMMU ! Clear FaultValid bit
|
|
|
|
|
membar #Sync
|
|
|
|
|
sethi %hi(109f), %g7
|
|
|
|
|
ba,pt %xcc, etrap
|
|
|
|
|
109: or %g7, %lo(109b), %g7
|
|
|
|
|
mov %l4, %o1
|
|
|
|
|
mov %l5, %o2
|
|
|
|
|
call spitfire_insn_access_exception
|
|
|
|
|
add %sp, PTREGS_OFF, %o0
|
2016-04-28 05:27:37 +08:00
|
|
|
ba,a,pt %xcc, rtrap
|
2008-04-28 15:47:20 +08:00
|
|
|
.size __spitfire_insn_access_exception,.-__spitfire_insn_access_exception
|
